Better use an old printer indeed, since modern printers can have tracking dots with a timestamp and a serial number of the printer, which both can give away the

Better use an old printer indeed, since modern printers can have tracking dots with a timestamp and a serial number of the printer, which both can give away the backdating (https://en.wikipedia.org/wiki/Machine_Identification_Code https://en.wikipedia.org/wiki/Machine_Identification_Code)